// 命令模式
class Receiver {
  execute() {
    console.log('接收者执行命令');
  }
}
class Command {
  constructor(receiver) {
    this.receiver = receiver;
  }
  execute() {
      console.log('命令对象->接收者->对应接口执行');
    this.receiver.execute();
  }
}
class Invoker {
  constructor(command) {
    this.command = command;
  }
  execute() {
      console.log('调用者执行命令');
    this.command.execute();
  }
}

/**
 * 调用者执行命令
 * 命令对象->接收者->对应接口执行
 * 接收者执行命令
 */
const receiver = new Receiver();
const command = new Command(receiver);
const invoker = new Invoker(command);
invoker.execute();